1670. Design Front Middle Back Queue

LeetCodeArrayLinked ListDesignQueueDoubly-Linked ListData StreamOpen on judge ↗

Design a queue that supports push and pop operations in the front, middle, and back. Implement the FrontMiddleBack class: - FrontMiddleBack() Initializes the queue. - void pushFront(int val) Adds val to the front of the queue. - void pushMiddle(int val) Adds val to the middle of the queue. - void pushBack(int val) Adds val to the back of the queue. - int popFront() Removes the front element

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solution.cppC++17

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